Sewing-machine.



l APPLICATiON FILED DEC. 7| 1915.

G. W. NELSON.

SEWING MACHINE.

Patented May 29, 1917.

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APPLICATION FILED DEC. 7. 1915.

Patented May 29, 1917.

2 SHEETS-SHEET 2 QZ By l m15 GEORGE W. NELSON, OF CLEVELAND, OHIO,ASSIGNOR T0 THE STANDARD SEWING MACHINE COMPANY, 0F CLEVELAND, OHIO, ACORPORATION OIE OHIO.

SEWING-MACHINE.

Specification of Letters Patent.

Patented May 29, 191 7.

Application filed December 7, 1915. Serial No. 65,479.

citizen of the United States, and resident of' Cleveland, in the countyof Cuyahogaand State of Ohio, have invented certain new and usefulImprovements in Sewing-Machines, of which the following is aspeciiication.` My invention relates to improvements in sewing machinesand more particularlyV to sewing machines of the rotary hook type, such,for example, as shown in Letters Patent No. 1,005,250, dated October 10,1911. The main object of my invention is to facilitate the handling ofthe hook and associated parts, such as the bobbin, bobbin-case, andbobbin-'case latch, both in their removal from and replacement in themachine, and

also in their adjustment relative to coperating parts of the machine.This object I accomplish by adapting and combining the said severalparts for unitary handling and adjustment.

The invention is illustrated in the accompanying drawings, in which-Figure 1 is a bottom plan view of a sewing machine embodying myinvention, and

Fig. 2 is a side view of the construction shown in Fig. 1, partly brokenaway and in section.

As my invention relates only to the hook and associated parts located atthe under side of the bed-plate of the machine, I have limited theillustration of the machine accordingly. i

As shown, 1 indicates the bed-plate, 2 the hook shaft carrying at itsfront end the at:- tached hook 3, and 4 the drive belt engaging asprocket wheel on the rear end of thel drive shaft. .v 1

The shaft 2 is supported adjacent its Op,- posite ends in bushedbearings 5 and 6, which bearings as here shown are formed in asupporting bracket 7 detachably and adjustably connected to thebed-plate in substantially the same manner as disclosed in the aforesaidPatent No. 1,005,250. So far as my present inventionis concerned,however, the shaft 2might be supported in bearings formed or otherwiselocated at the under side of the bed-plate in any suitable or desiredmanner.

In accordance with my invention, the shaft 2 is transversely dividedbetween its end bearings, as indicated at 8, wherebyV the front endthereof with its attached hook may be readily removed from the machinewithout disturbing the connection of the rear endnwith the shaft drivingmeans. As a means for operatively coupling the shaft endsA` or sectionsto permit of such disconnection of the same', I have attached sleeves 9,9,

to the adjacent ends of the shaft sections having overlapping ends 10,10, which coperate to couple the shaft sections for rotary movement andwhich alsopermit of the front section being adjusted longitudinally ofthe rear" section for the purpose of positioning its. attached hook-relative to the vertical path of the needle n.

The bushing 11 of the bearing 5 is provided at its front end with abracket 12 having two forwardly `projecting arms 13, 13, to` which ispivotally connected a latch 11 forholding the bobbin-case 15 and itscontained bobbin 16 in operative position within the hook. A springcatch 17 for holding the latch 14: in closed position is also carried bythe bracket 12, being connected thereto at 18;v The bushing 11, carryingby its bracket 12thev complete bobbin-case latch device, is connectedlongitudinally with the hook-carrying section of the shaft 2 journaledtherein, by the engagement of its opposite ends vvithfshoulders on saidshaft, one shoulder being provided by the hub 19 of the hook and theother shoulder being provided by the coupling sleeve 9, as shown. c Thebushing 11, withA its connected parts as described, is removably andadjustably held within the bearing 5 by suitable fastening means. Thesefastening means as here shown, comprise a setscrew 20 carried by the,bracket 7 for engaging the bushing to holdit :against longitudinalmovement, and anadjusting screw 21 also carried by the bracketV 7 forengaging the bushing bracket 12 within a seat 22 therein to hold thebushing against rotary or turning movements in its support. This screw21, by endwise adjust- 1nent,also serves to position the parts wherebythe hook will ,be brought in proper relation to the path of the needle.

A By dividing the hook shaft in a manner to render it botheXten'Sibleand separable, and combining as a single unit the front shaftsection and bushing with their supported parts, comprising the hook,bobbin,y bobbincase,.and bobbin-case latch, in the manner shown4andrdescribed, it enablesthe several parts comprised in such unit,after being once properly adjusted to their position in the machine bythe setting of the'adjusting screw 21, to be removed froml and replacedin the machine as often as desired without further readjustment, andalso enables the hook and associated parts to be adjusted as Y f fromthe needle path, a shaft havingan attached hook journaled in saidbushing and a bobbin-case latch connected to the bushing independentlyof said hook and both the shaft and the latch being adjustable with thebushing, and means for adjustably holding the bushing in alongitudinally stationary position.

2. In a sewing machine, the combination with a reciprocating needle, ofa bed-plate having a support at its under side, a bushing carried `bvsaid support and longitudinally adjustable in a direction toward andfrom the needle path and having a latchsupporting bracket at that endadjacent the needle path, a shaft having an attached hook journaled insaid bushing and a bobbin-case latch connected to said supportingbracketl and both being adjustable with the bushing,and means foradjustably holding the bushing in a longitudinally stationary position.

3. In a sewing machine, the combination with a bed-plate having asupport at its under side, of a bushing removably connected with saidsupport, and a drive shaft having an attached hook, aV bobbin, a-bobbincase, and a bobbin-case latch, all carried by said bushing and removabletherewith from the bed-plate support, the said bobbin-case latch beingmounted on the bushing independently of the hook.

' 4. In a. sewing machine, the combination with a bed-plate having asupport at its under side formed with an opening eX- tending lengthwiseof the bed-plate, of a bushing adjustably and removably seated in saidopening, a drive shaft having an attached hook, a bobbin, a bobbin-case,and

a bobbin-case latch, all carried by said bushing for adjustment andmovement therewith, the said bobbin-case latch being mounted on thebushing independently of the hoek, and means for holding the bushing andsupported parts in adjusted position.V

side one` of which comprises a longitudinally adjustable bushing, asectional drive shaft supported in said bearings and being extensible inthe direction of its length and carrying a hook and bobbin at the endthereof adjacent the needle path, that part of the shaft carrying thehook being connected with the bushing for longitudinal adjustmenttherewith, and means for adjustably holding the bushing in alongitudinally stationary position.

6. In a. lock-stitch sewing machine, the combination with areciprocating needle, of a bed-plate having bearings at its under side`a drive shaftsupported in said bearings and carrying a hook and bobbinat its forward end, said shaft being transversely divided between itsends and coupled by means permitting of the free endwise withdrawal ofthe hook-carrying end from the opposite or rear end, and meansadjustably holding the hook-carrying end of the shaft in alongitudinally stationary position relative to the needle path.

7. In a lock-stitch sewing machine, the combination with a of abed-plate having bearings at its under side, a drive shaft supported insaid bearings and carrying a hook and bobbin at its forward end, saidshaft being transversely divided between its ends and connected by asplit coupling permitting of the free endwise withdrawal of thehook-carrying end from the opposite or rear end, and means adjustablyholding the hook-carrying end of the shaft in a longitudinallystationary position relative to the needle path.

8. In a lock-stitch sewing machine, the combination with a reciprocatingneedle, of a bed-plate having bearings at its under side one of whichcomprises a longitudinally adjustable bushing, a drive shaft supportedin said bearings and carrying a hook and bobbin at its forward end, saidshaft being transversely divided between its ends and connected by asplit coupling permitting of the free endwise withdrawal of thehookcarrying end from the opposite or rear end, means connecting thehook-carrying end with the bushing for longitudinal adjustmenttherewith, and means adjustably holding the bushing in a longitudinallystationary position.

9. In a lock-stitch sewing machine, the combination with a reciprocatingneedle, of a bed-plate having a support at its under side, a bushingremovably connected with said support, a drive shaft having an attachedhook, a bobbin, a bobbin-case, and a bobbin-case latch, all carried bysaid bushing and removable therewith from the bed-plate support, thesaid bobbin-case latch being mounted on the bushing independently of thehook, adjustable means for determining the position of the bushing andits supported parts relative tothe needle path, and

reciprocating needle,

means for adjustably holding the bushing in a longitudinally stationaryposition.

10. In a lock-stitch sewing machine,.the combination with areciprocating needle, of a bed-plate having a support at its under side,a bushing removably connected with said support, a drive shaft having anattached hook, a bobbin, a bobbin-fcase, and a bobbin-case latch, allcarried by said bushing and removable therewith from the bedplatesupport, the said bobbin-case latch being mounted on the bushingindependently of the hook, an adjustable stop on-the support forengaging with a partof the bushing and determining the position of thelatter and its associated parts relative to the needle ath, and meansfor holding the bushing an associated parts in adjusted position.

11. In a lock-stitch sewing machine, the combination with areciprocating needle, of a bed-plate having a support at its under side,a bushing removably connected with said support and having alatch-supporting bracket at one end thereof, a hook driveshaft journaledin said bushing and a bobbin-case latch pivoted to the bracket on saidbushing, an adjusting screw on the support engaging the bushing bracketto adjustably position the bushing and associated parts relative to theneedle path, and means for holding the bushing and associated parts inadjusted position.

12. In a lock-stitch sewing machine, the combination with a bed-platehaving a support at its under side, of a bushing longitudinallyadjustable in said support, a hook shaft journaled in said bushing, ahook on said shaft, a bobbin-case supported in the hook, and abobbin-case latch attached to the bushing independently of the hook endand adjustable therewith.

13. In a lock-stitch sewing machine, the combination with a bed-platehaving a support at its under side, of a bushing longitudinallyadjustable in said support and having at its front end a"projectinglatch- .supporting bracket, a hook' shaft `journaled in said bushing, ahook on said shaft, a

bobbin-case supported in the hook, and a bobbin-case latch attached toand supported by the bushing bracket.

' Signed at Cleveland, in the county of Cuyahoga, and State of Ohio,this 2d day of December, A. D. 1915.

" GEORGE W. NELSON.

Witnesses:

` CHAs. C. EMMoNs,

H. B. KNAPB.

Copies of this patent may be obtained for ve cents each, by addressingthe Gommssioner of Patents, Washington, D. C.

